upstateguy
Headphoneus Supremus
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Why doesn't someone start another NwAvGuy's O2 DIY Amplifier thread in the amp forum, so we can pick up where we left off
Why doesn't someone start another NwAvGuy's O2 DIY Amplifier thread in the amp forum, so we can pick up where we left off
Neither rig sounds as good as my AMB Gamma2 coupled with Beta22 and neither rig is truly portable.
1) O2 does not sound far less than my previous AMB M3
@ upstateguy
I am not sure comparing AMB Beta22 with Objective2 is fair, in view of the difference in size, part cost/quality and power supply. However, since you asked for it, here it is.
Overall Beta22 provides better musical immersion, soundstage depth (O2 is more upfront in presentation) and dynamic contrast.
In bass region, Beta22 hits noticeably harder and deeper than O2. Speed, tightness, and resolution is about on par.
In mid region, they are on par. Music may sound slightly closer to you with O2, which maybe a good thing if you want a more forwarded presentation (in comparison sense, as neither is overly forward).
In treble region, Beta22 sounds noticeably more laid-back (but still clear/clean enough for my ears). O2 let you hear treble more closely when you are analyzing or monitoring. When using some bright headphones such as DT880s or K701s, I would prefer Beta22 over O2. If you have some music that sounds aggressive and trebly, Beta22 may work better. If your music sounds too distant for you to start with, I would suggest using O2.
To my ears, Beta22 is worth the difference in cost. If I do not need portability, I would always use Beta22. My Beta22 is a simple 2 board built with a separated Sigma22, but they weight 10lb+ easily.
I bought AND KEPT O2 because:
1) O2 does not sound far less than my previous AMB M3 (based on memory only, sorry can not offer impression between O2 vs M3. But based on side-by-side comparison, my ears did prefer Beta22 over M3 overall and especially in terms of soundstage, musical immersion and refinement);
2) O2 is transportable (i.e., fits in my jean pocket) and drives LCD-2s sufficiently when I need a clean portable amp around my house. O2 is cheap but good enough to be my secondary rig outside of my man cave (which has Beta22).
3) O2 can be used as a battery-powered pre-amp that is free of noise (e.g., no ground loop), if you do not mind using adapters. O2 drives my FirstWatt F2 clone beautifully without any noise. By contrast, I had to have my M3 modified to work as a pre-amp (M3's stock gain 11X and ground loop caused noise).
The more interesting thing is the ODAC I think. And that fits into the O2 default enclosure if you remove the batteries, as well as the ODA, but of course it can be used as a standalone DAC too. Anybody planning to get an ODAC? (I probably won't.) Are you willing to give up on the batteries? I rarely make use of the battery operation, but maybe others use it much more. I guess the ODAC will need its own thread when the time comes.
@ upstateguy
I am not sure comparing AMB Beta22 with Objective2 is fair, in view of the difference in size, part cost/quality and power supply. However, since you asked for it, here it is.
Overall Beta22 provides better musical immersion, soundstage depth (O2 is more upfront in presentation) and dynamic contrast.
In bass region, Beta22 hits noticeably harder and deeper than O2. Speed, tightness, and resolution is about on par.
In mid region, they are on par. Music may sound slightly closer to you with O2, which maybe a good thing if you want a more forwarded presentation (in comparison sense, as neither is overly forward).
In treble region, Beta22 sounds noticeably more laid-back (but still clear/clean enough for my ears). O2 let you hear treble more closely when you are analyzing or monitoring. When using some bright headphones such as DT880s or K701s, I would prefer Beta22 over O2. If you have some music that sounds aggressive and trebly, Beta22 may work better. If your music sounds too distant for you to start with, I would suggest using O2.
To my ears, Beta22 is worth the difference in cost. If I do not need portability, I would always use Beta22. My Beta22 is a simple 2 board built with a separated Sigma22, but they weight 10lb+ easily.
I bought AND KEPT O2 because:
1) O2 does not sound far less than my previous AMB M3 (based on memory only, sorry can not offer impression between O2 vs M3. But based on side-by-side comparison, my ears did prefer Beta22 over M3 overall and especially in terms of soundstage, musical immersion and refinement);
2) O2 is transportable (i.e., fits in my jean pocket) and drives LCD-2s sufficiently when I need a clean portable amp around my house. O2 is cheap but good enough to be my secondary rig outside of my man cave (which has Beta22).
3) O2 can be used as a battery-powered pre-amp that is free of noise (e.g., no ground loop), if you do not mind using adapters. O2 drives my FirstWatt F2 clone beautifully without any noise. By contrast, I had to have my M3 modified to work as a pre-amp (M3's stock gain 11X and ground loop caused noise).
Sounds to me like your B22 is coloring the sound a bit, boosting the bass and depressing the treble. My O2 sounds like a less powerful GS-1 while my M^3 sounds like a less powerful beta.
Both the O2 and the GS-1 have a greater transparency more resolution than the M^3, which interestingly, colors the sound in the same way your beta does.
I haven't compared the GS-1 with a beta in a while but when I did, I felt the GS-1 was cleaner and more transparent and the Beta more powerful and capable of higher volumes.